Hand hair clipper part



Nov. 2 1926. 1,605,813

, J. DEAN HAND HAIR CLIPPER PART Filed Mgy 17, 192e gru/wagte@ 33"# Mwattouwq Patented Nov. 2, 1926.

UNITED Slll'lb JOHN DEAN, OF RACINE, WISCONSIN.

HAND HAIR-GLIPPER PART.

Application filed. May 17,

Thisinvention relates to fixed handle and cap units for hand hairclippers particularly of the so-called torsion .spring type; and theobjects and nature of the invention will be readily understood by thoseskilled in the art in the light of the following explanautions of theaccompanying drawings that show what I now believe to be the preferredmechanical expression or embodiment of my invention from among otherforms, arrange-v ments and constructions within the spirit and scopethereof.

Hand hair clippers of the type mentioned, as now found on t-he market,embody a flat bottom blade or comb plate that constitutes the base plateof the implement; acooperating `reciprocatingblade that slides on thetop face of the base plate; a cap and the fixed handle formed by asingle'casting; the lever handle composed of a single casting andfulcrumed on a hollow pintle` formed by a bushing rigid with the cap,and receiving the main bolt passing through the base plate, pintle andcap and having the clamping nut located above the cap,`and a torsion.spring arranged within the cap surrounding the hub of the lever handlewith one end bearing on the lever handle and the other .end confined `tothe cap, the lever handle having a forwardly extending nose within thecap loosely entering the reciprocating blade'for the purpose ofreciprocating said blade as the ,lever handle is oscillat-ed. Theseclippers now on the market are unduly expensive in production, mainlybecause of the one piece casting forming the cap and fixed handle whichas a foundry or casting probl-cm is ,very difficult and expensive toproduce, and which when properly produced requires much expensive handwork in preparation and fitting for assem bly, and in the properpreparation and nishing thereof to receive the necessary plating and inthe production of the approxi mately-perfect finished plated articlewithout objectionable blemishes. In fact, about one half of the factoryor manufacturing 4cost of these old clippers, is chargeable against thefinishing operations required mainly due to the comparatively heavycom-` plicated casting that forms the cap and fixed handle, and thevariations in such castings which may run as high as from thirty toforty one thousandths of an inch or more even in otherwise perfectcastings.

An object of the invention is to produce 192e. serial No. 10a-,75s.

an improved fixed handle and cap unit for hand hair clipperswith the endin view of reducing hair clipper product-ion costs.

Vith this and other objects in view, the invention consists in certainnovel features in ystructure or in format-ion or in combinations orarrangements as more fully described and specified hereinafter.

The invention also involves an .externally plated fixed handle and capunit for hair clippers wherein the cap is produced by a method, otherthan by casting, which will necessarily produce caps of a series uniformand accurate in essential dimensions and of exterior surface conditionsready for the plating operation without requiring preliminary expensivehand finishing; and wherein the fixed handle portion` consists of asimple malleable casting the exterior 'surface of which has been broughtto condition for the plating' process by any suitable mechanicalfinishing operation without expensive hand labor, with these two membersso relatively formed as to fit one Within the other for rigid union by ajoint preferablyl concealed within the cap, providing anchorage forthetrunnion located within the cap, which trunnion is preferably utilizedfor riveting or fixing thehandle portion and cap together. v

Referring to the accompanying `drawings that form a. part hereofz*` yFig. l is a side elevation of the unit, the handle portion beingpartially broken away.

Fig. 2 is a top plan.

Fig. 3 is a vertical section.

Fig. 4f is a bottom plan. y

Fig. 5 is a detail detached perspective of the cap element.

Fig. 6 is adetail detached perspective of the handle element. Y

Fig. 7 is a front view ofthe cap element iartially broken away@ i Fig. 8is a plan view of a blank from which the cap unit'can be pressed up bycies. i

The cap ,is hollow and in the form of an inverted cup or hood, and isformed by dies andl preferably composed of sheet or plate stee i rlhiscap is provided with a vertical longitudinally hollow trunnion 5, rigidwithV and depending within the cap from the fiat top wall thereof, andthe bore of this trunnion is open at the top of the cap, for the passageof the clamping bolt of the hair clipper casting, which is small and 25i the mechanical meblade up .to the toothedfront port-ion thereof. Thelower front edge portions of the cap are formed to bear on and hold theblade down to operative sliding engagement with the top face of the hairclipper base plate with "the teeth of the blade in operatiye slidingengagement with the teeth ofthe hase plate, and to hold the blade tostraight line reciprocation.

The voperating Alever handle and its hub and, nose, areusually,formedjby a single of such form that it 'can be economicallyproduced, and then economically fiV ishedl for lelectro-plating bymechanical'processes or means (suchasby `tumbling process) withoutrequiring expensive hand work. The saine Aistrue of the handle 8, apartfrom the cap'. lhence,/form the handle 8, separately from 4the cap, andprovide the same with a fiat laterally enlarged securing head 8?,integral 'with the handle and projecting Jforwardly Vfrom theflow'er lorfront end thereof. This handle portion 8 withits securing head issmall,` and ofy suoli shape that it can` befeconomicallyproduced inoiiejpiece lby casting and economically `finished for electroplating byJmechanicalprocesses or means without requiring expensivefhfand labor.

The `public1 and "trade, requirements necessitate electroplating theexterior surfaces of the cap, as well as the handles', and hencethe capsurfaces must bein condi ionto receive electroplating` and4 producevaproper plated surface. rAlso, caps mustbe produced accurately anduniformly dimensioned, to

avoid expensive hand ittingaiid machining woil,prepai"atory toassembling with the blades, etc. lt is not possible'v tov attain theseends, by either castingy the caps separately or in one piece with `thehandles 8. I attain the results" desired Vvby 'forming the capsseparately, not'by a casting operation, but by the use of plate metal,such as sheet or plate steel, and dies yby which the plate or sheetmetal is accurately and uniformly shaped to the enact form and'dimensions required withexterior surfaces that can be electroplated toproduce the plated surfaces required without expensive hnishingpreparatory to plating. Thedies will produce a series of' platemetalcaps that are accurately uniform in shape and dimensions to meet thepredetermined requirements, for quick and accurate assembly with otherparts of the clippers.

The separately produced caps and handles 8 are rigidly and permanentlyunited in proper relation before electro-plating, with the formation ofa joint at the union between handleand Icap that is approximatelyhi'lden or concealed, after the cap handle iuiitA is plated, and thatdoes Inot result in anobjectionable blemish in the yplated surfacesatthe'iiiiion. y

In lthe particularV example shown, `the Acap is composed of vcold rolledsheet', or plate steelshaped up by the use, of dies, although Ifdo'iiotwish to limit all features of myinvention to a cap composed of coldrolled steel.

This sheet or" 'plate liiietal vrcalp is rformed lor shaped tohtfaiidinterlock with' the'cast l'iandleiiiember 8, in such mannerfa's topermit the formation of` thefdesir'ed rigid permanent 'union rbetweenthe handle and Vcap members. For instance, in the example illustrated,the sheet metal 'ca'p is formed with a 'flat top wall 18, ratits outerrear corner having a cutoff portion or notch forming a vertical opening12, while the vupper portion ofthe rear'depending wall 14 ofthe cap` isformed'with a vlaterally elongated horizontal slot 15, at one endportion 'merg ing into vertical opening 12, and at the opposite endopening into the open rear corner portion ofthe cap,v'sai'd`s lot,beingapproximately flush 'with the bott-0in vsurface of the flat vtop wall"13 of the cap.

The cap, with its `said lrezar upper openings, is 'so formed withrespect tovtlie head Sa and itspjun'lction with 'the handle portion '8,that'said parts can be'as's'einbled (after the handlefportion ,8 hasybeen. hnished for plating nas by a mechanical tumbling treatnient)V"byi `slipp'ii'i'g the head f8?, y forwardly into 'the `cap Jthrough`slot l5 Muntil the handle 8 where A,it rises from the headA 8 lits `andclosesthe verticalopening 12 2and the rearedgeof the'head 8, closestheslot '.15 andis tl'ush with ythe rear vertical face rof the rearwall'lfl, thefront edge. of fthe head 8a' approximately ab'uts the upperpart of the inner surface of the depending front wall of the cap. lVhenthe handle vand cap arethiisassemblech,the `headl 8a is concealed withinthe.) cap parallel with the top iyall'lS and fitting Vtheb'ottomfsurface thereof and approximately fully, occupying lthe 4upperend or tofp portion of the interior of the cap. `/Vhile 4the cap andhandle are lthus ,held assembled iiifthe relativei'posithus faces theunderside of cap top Wall 13 and is united t-hereto and the cap top isthus laminated or of double thickness. This double-thickness cap Wallcan then be vertically bored or drilled to form the bore that receivesthe upper end of the hollow trunnion 5, and in which the same is rigidlyanchored to the cap. The handle portion head 8u and the sheet steel topWall of the cap provide a thick deep foundation for the strong rigidanchoring of the trunnion.

' I prefer, however, to utilize the metal bushing or tube that forms thetrunnion 5, as the rivet or means for permanently and rigidly fixingtogether the handle and cap elements. The handle end 8a, is shaped toconform to the interior top portion of the cap vand to accurately fittherein and engage the base portions of the depending cap Wall. Thehandle end 8a, is held rigidly in its normal position Within the cap andthe hole for the trunnion is drilled through the end 8u and the cap top,or the holes in sait parts can be separately formed, and the parts thenheld together With the holes in registration, While the trunnion isfitted in said holes and upset or expanded to rigidly rivet and lock theparts permanently together.

After the handle portion and cap have thus been permanently united bythe joint or union concealed Within the cap, exterior surfaces of thehandle-cap unit thus formed, can be finished for the market byelectroplating and burnishing.

The unit thus formed can be easily assembled with the blades, operatinghandle, spring and bolt, Without expensive hand work and fitting toprovide the necessary clearance Within the cap for Working parts. Thesheet steel shaped by the dies will accurately produce the cap accordingto the predetermined dimensions necessary to provide clearance andaccurate fitting of the cap with and to the blades.

The caps can be pressed up by dies from the flat plate or sheet steelblank of Fig. 8, composed, say, of one sixteenth cold rolled mild steel,and the top hole and back slot can be punched after the cap has beenformed by the dies, although I do not Wish to so limit all features ofmy invention, as other forms, material, and steps might be employed andfollowed.

The handle section 8, is preferably com` posed of a. malleable ironcasting With its head or applying' end 8 accurately sized by dies tosnugly and closely fit Within the cap top and to produce uniformthickness.

It is evident that various changes, modifications and variations mightbe resorted to Without departing from the spirit and scope of myinvention, and hence I do not Wish to limit myself to the exactdisclosures hereof.

What I claimv is:

l. An exteriorly plated fixed handle and cap unit for hand hairclippers, comprising a separately formed cap, and a separately formedhandle extending into the cap and exteriorly from the cap and fixedthereto whereby the union between 3. An exteriorly plated fixed handleandk cap unit for hair clippers, comprising a cast metal handle of ashape to permit surface finishing by mechanical tumbling operation, asheetsteel pressed up cap shaped to interiorly receive an end of saidhandle With the handle extending from the interior to the exterior ofthe cap, said handle end being fitted Within and therein fixed to thecap an-d covered thereby with the handle and cap in permanent operativehandle and cap unit form.

4. A fixed handle and cap unit for hair clippers, comprising a pressedup sheet steel cap, a cast metal handle of shape for surface finishingby mechanical tumbling operation and having an end fitting said cap, anda fixed trunnion securing together the handle CII and cap in permanentoperative handle and I cap unit form.

5. A fixed handle and cap unit for hair clippers, comprising a pressedup sheet metal cap, a malleable casting handle having an end formed tosnugly lit the upper part of the interior of the cap, and a trunnionWithin the cap and anchored Within the cap top and handle end andrigidly fixing said parts together.

6. A. fixed handle and cap'unit for hair clippers, comprising a capelement, ah'andle element having an end head fitted to the cap, and atrunnion passing through said head and the adjacent cap Wall andriveting said parts rigidly together.

Signed at Racine, Wisconsin, this 11th day of -May 1926.

JOI-IN DEAN.

